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Yang HC, Du YS, Lee JJ, Yeh CH, Tseng MC, Ho YC, Kuo HW, Yoshida H, Fujii A, Ozaki M, Tao YT, Akutagawg T, Chen HH. Morphology and Alignment Transition of Hexabenzocoronene (HBC) Mesogen Films by Bar Coating: Effect of Coating Speed. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:16846-16854. [PMID: 39094224 PMCID: PMC11325635 DOI: 10.1021/acs.langmuir.4c01331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/04/2024]
Abstract
Films of the discotic liquid crystalline hexabenzocoronene (HBC) derivative, HBC-1,3,5-Ph-C12, were prepared on the quartz substrate by the bar-coating method. Depending on the coating speed, regularly spaced stripes or continuous films were observed. In the former case, columns of the HBC derivatives align more along the stripes, which are perpendicular to the coating direction, whereas in the latter case, columns of the HBC derivatives in the film align more along the coating direction. These distinctive structures are confirmed via polarized optical microscopy (POM), polarized UV-vis spectroscopy, and grazing incidence small-angle X-ray scattering measurements.
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Affiliation(s)
- Hao-Chun Yang
- Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei 106, Taiwan
| | - You-Sheng Du
- Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei 106, Taiwan
| | - Jey-Jau Lee
- National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan
| | - Chun-Hong Yeh
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan
| | - Mei-Chun Tseng
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan
| | - Yi-Chi Ho
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan
| | - Han-Wen Kuo
- Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei 106, Taiwan
| | - Hiroyuki Yoshida
- School of Engineering Building VII, Kwansei Gakuin University, Sanda 662-8501, Japan
| | - Akihiko Fujii
- Department of Electrical and Electronic Systems Engineering, Osaka Institute of Technology, Omiya, Asahi-ku, Osaka 535-8585, Japan
| | - Masanori Ozaki
- Division of Electrical, Electronic and Infocommunications Engineering, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yu-Tai Tao
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan
| | - Tomoyuki Akutagawg
- Graduate School of Engineering, Tohoku University, Sendai 980-8577, Japan
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Hsiu-Hui Chen
- Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei 106, Taiwan
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Dacha P, Hambsch M, Pohl D, Haase K, Löffler M, Lan T, Feng X, Rellinghaus B, Mannsfeld SCB. Tailoring the Morphology of a Diketopyrrolopyrrole-based Polymer as Films or Wires for High-Performance OFETs using Solution Shearing. SMALL METHODS 2024; 8:e2300842. [PMID: 38009770 DOI: 10.1002/smtd.202300842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Indexed: 11/29/2023]
Abstract
Conjugated polymers often show efficient charge carrier transport along their backbone which is a primary factor in the electrical behavior of Organic Field Effect Transistor (OFETs) devices fabricated from these materials. Herein, a solution shearing procedure is reported to fabricate micro/nano wires from a diketopyrrolopyrrole (DPP)-based polymer. Millimeter to nanometer long polymer wires orientated in the coating direction are developed after a thorough analysis of the deposition conditions. It shows several morphological regimes-film, transition, and wires and experimentally derive a phase diagram for the parameters coating speed and surface energy of the substrate. The as-fabricated wires are isolated, which is confirmed by optical, atomic force, and scanning electron microscopy. Beside the macroscopic alignment of wires, cross-polarized optical microscopy images show strong birefringence suggesting a high degree of molecular orientation. This is further substantiated by polarized UV-Vis-NIR spectroscopy, selected area electron diffraction transmission electron microscopy, and grazing-incidence wide-angle X-ray scattering. Finally, an enhanced electrical performance of single wire OFETs is observed with a 15-fold increase in effective charge carrier mobility to 1.57 cm2 V-1 s-1 over devices using films (0.1 cm2 V-1 s-1 ) with similar values for on/off current ratio and threshold voltage.
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Affiliation(s)
- Preetam Dacha
- Center for Advancing Electronics Dresden (cfaed), Technische Universität Dresden, 01069, Dresden, Germany
- Faculty of Electrical and Computer Engineering, Technische Universität Dresden, 01069, Dresden, Germany
| | - Mike Hambsch
- Center for Advancing Electronics Dresden (cfaed), Technische Universität Dresden, 01069, Dresden, Germany
| | - Darius Pohl
- Dresden Center for Nanoanalysis (DCN), Center for Advancing Electronics Dresden (cfaed), Technische Universität Dresden, 01069, Dresden, Germany
| | - Katherina Haase
- Center for Advancing Electronics Dresden (cfaed), Technische Universität Dresden, 01069, Dresden, Germany
- Faculty of Electrical and Computer Engineering, Technische Universität Dresden, 01069, Dresden, Germany
| | - Markus Löffler
- Dresden Center for Nanoanalysis (DCN), Center for Advancing Electronics Dresden (cfaed), Technische Universität Dresden, 01069, Dresden, Germany
| | - Tianshu Lan
- Center for Advancing Electronics Dresden (cfaed), Technische Universität Dresden, 01069, Dresden, Germany
- Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01069, Dresden, Germany
- Max Planck Institute of Microstructure Physics, Weinberg 2, 06120, Halle (Saale), Germany
| | - Xinliang Feng
- Center for Advancing Electronics Dresden (cfaed), Technische Universität Dresden, 01069, Dresden, Germany
- Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01069, Dresden, Germany
- Max Planck Institute of Microstructure Physics, Weinberg 2, 06120, Halle (Saale), Germany
| | - Bernd Rellinghaus
- Dresden Center for Nanoanalysis (DCN), Center for Advancing Electronics Dresden (cfaed), Technische Universität Dresden, 01069, Dresden, Germany
| | - Stefan C B Mannsfeld
- Center for Advancing Electronics Dresden (cfaed), Technische Universität Dresden, 01069, Dresden, Germany
- Faculty of Electrical and Computer Engineering, Technische Universität Dresden, 01069, Dresden, Germany
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3
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Zhao Q, Zhu S, Peng J. Unraveling the Co-Crystallization-Charge Transport Relation in Conjugated Polymer Blends via Meniscus-Assisted Solution-Shearing. Macromol Rapid Commun 2023; 44:e2200622. [PMID: 36103725 DOI: 10.1002/marc.202200622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 09/07/2022] [Indexed: 01/26/2023]
Abstract
The ability to craft the co-crystallization in conjugated polymer blends represents an important endeavor for the enhancement of charge transport. However, simple and efficient approaches to co-crystallization have yet to be realized. Herein, for the first time, a robust meniscus-assisted solution-shearing (MASS) strategy is reported to achieve co-crystallization in the poly(2,5-bis(3-hexylthiophen-2-yl)thieno[3,2-b]thiophene) (PBTTT-C6) and poly(2,5-bis(3-decylthiophen-2-yl)thieno[3,2-b]thiophene) (PBTTT-C10) blended films, and correlate this co-crystalline structure to the charge transport properties. The as-cast PBTTT-C6/PBTTT-C10 blends exhibit co-crystalline or phase-separated structures influenced by their molecular weights. Interestingly, confined-shearing of the initial phase-separated blended solution to MASS produces the formation of their co-crystallization. The co-crystallization kinetics accompanied by the chain packing change and optical properties are scrutinized. Finally, the resulting organic field-effect transistors (OFETs) signify the cocrystal-facilitated charge transport in the blends. Conceptually, this efficient MASS strategy in rendering the co-crystallization in conjugated polymer blends can be readily extended to other conjugated polymer blends of interest for a variety of device applications.
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Affiliation(s)
- Qingqing Zhao
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
| | - Shuyin Zhu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
| | - Juan Peng
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
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Kafle P, Huang S, Park KS, Zhang F, Yu H, Kasprzak CE, Kim H, Schroeder CM, van der Zande AM, Diao Y. Role of Interfacial Interactions in the Graphene-Directed Assembly of Monolayer Conjugated Polymers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:6984-6995. [PMID: 35613042 DOI: 10.1021/acs.langmuir.2c00570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Development of graphene-organic hybrid electronics is one of the most promising directions for next-generation electronic materials. However, it remains challenging to understand the graphene-organic semiconductor interactions right at the interface, which is key to designing hybrid electronics. Herein, we study the influence of graphene on the multiscale morphology of solution-processed monolayers of conjugated polymers (PII-2T, DPP-BTz, DPP2T-TT, and DPP-T-TMS). The strong interaction between graphene and PII-2T was manifested in the high fiber density and high film coverage of monolayer films deposited on graphene compared to plasma SiO2 substrates. The monolayer films on graphene also exhibited a higher relative degree of crystallinity and dichroic ratio or polymer alignment, i.e., higher degree of order. Raman spectroscopy revealed the increased backbone planarity of the conjugated polymers upon deposition on graphene as well as the existence of electronic interaction across the interface. This speculation was further substantiated by the results of photoelectron spectroscopy (XPS and UPS) of PII-2T, which showed a decrease in binding energy of several atomic energy levels, movement of the Fermi level toward HOMO, and an increase in work function, all of which indicate p-doping of the polymer. Our results provide a new level of understanding on graphene-polymer interactions at nanoscopic interfaces and the consequent impact on multiscale morphology, which will aid in the design of efficient graphene-organic hybrid electronics.
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Affiliation(s)
- Prapti Kafle
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Siyuan Huang
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Kyung Sun Park
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Fengjiao Zhang
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hao Yu
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Caroline E Kasprzak
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Hyunchul Kim
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Charles M Schroeder
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Arend M van der Zande
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Ying Diao
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
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Kafle P, Sanghavi R, Khasbaatar A, Punjani S, Davies DW, Diao Y. Drastic Modulation of Molecular Packing and Intrinsic Dissolution Rates by Meniscus-Guided Coating of Extremely Confined Pharmaceutical Thin Films. ACS APPLIED MATERIALS & INTERFACES 2021; 13:56519-56529. [PMID: 34783517 DOI: 10.1021/acsami.1c08398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Nanosizing has emerged as one of the most effective formulation strategies for enhancement of dissolution properties of active pharmaceutical ingredients (APIs). In addition to enhancing the specific area of the dissolving solids, nanosizing can also capture and stabilize the metastable form of the API, which can further enhance the solubility by drastic modulation of surface energies. Herein, we employ meniscus-guided coating to fabricate nanothin films of three APIs that show anticancer properties and are poorly soluble:10-HCPT, SN-38, and amonafide. By modulating the coating speed, we systematically deposited the APIs in films ranging from ∼200 nm thickness to extreme confinement of ∼10 nm (<10 molecular layers). In all three APIs, we observe a general order-to-disorder transition with semicrystalline (10-HCPT and amonafide) or amorphous (SN-38) form of API solids trapped in thin films when the thickness decreases below a critical value of ∼25-30 nm. The existence of a critical thickness highlights the importance of nanoconfinement in tuning molecular packing. In the case of 10-HCPT, we demonstrate that the disordered form of the API occurs largely due to lack of incorporation of water molecules in thinner films below the critical thickness, thereby disrupting the three-dimensional hydrogen-bonded network held by water molecules. We further developed a dissolution model that predicts variation of the intrinsic dissolution rate (IDR) with API film thickness, which also closely matched with experimental results. We achieved drastic improvement in the IDR of ∼240% in 10-HCPT by decreasing film thickness alone. Further leveraging the order-to-disorder transition led to 2570% modulation of the IDR for amonafide. Our work demonstrates, for the first time, opportunities to largely modulate API dissolution by precisely controlling the dimensionality of thin films.
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Affiliation(s)
- Prapti Kafle
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Rishabh Sanghavi
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Azzaya Khasbaatar
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Samdisha Punjani
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Daniel W Davies
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Ying Diao
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
- Beckman Institute, Molecular Science and Engineering, University of Illinois at Urbana-Champaign, 405 N Mathews Avenue, Urbana, Illinois 61801, United States
- Materials Research Laboratory, University of Illinois at Urbana-Champaign, 104 South Goodwin Avenue MC-230, Urbana, Illinois 61801, United States
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Pan S, Peng J, Lin Z. Large‐Scale Rapid Positioning of Hierarchical Assemblies of Conjugated Polymers via Meniscus‐Assisted Self‐Assembly. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101272] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Shuang Pan
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
- State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200438 China
| | - Juan Peng
- State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200438 China
| | - Zhiqun Lin
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 USA
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Pan S, Peng J, Lin Z. Large-Scale Rapid Positioning of Hierarchical Assemblies of Conjugated Polymers via Meniscus-Assisted Self-Assembly. Angew Chem Int Ed Engl 2021; 60:11751-11757. [PMID: 33650301 DOI: 10.1002/anie.202101272] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 02/23/2021] [Indexed: 02/04/2023]
Abstract
Rapid and deliberate patterning of nanomaterials over a large area is desirable for device manufacturing. We report a method for meniscus-assisted self-assembly (MASA)-enabled rapid positioning of hierarchically assembled dots and stripes composed of luminescent conjugated polymer over two length scales. Periodically arranged conjugated poly(9,9-dioctylfluorene) (PFO) polymers, yield dots, punch-holes and stripes at microscopic scale via MASA. Concurrent self-assembly of PFOs into two-dimensional lenticular crystals within each dot, punch-hole and stripe is realized at nanoscopic scale. Hierarchical assembly is achieved by constraining the evaporation of the PFOs solution in two approximately parallel plates via a MASA process. The three-phase contact line (TCL) of the liquid meniscus of the PFOs was printed using the upper plate, yielding an array of curved stripes. Rapid creation of hierarchical assemblies via MASA opens up possibilities for large-scale organization of a wide range of soft matters and nanomaterials.
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Affiliation(s)
- Shuang Pan
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.,State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
| | - Juan Peng
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
| | - Zhiqun Lin
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
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Charge Carrier Mobility Improvement in Diketopyrrolopyrrole Block-Copolymers by Shear Coating. Polymers (Basel) 2021; 13:polym13091435. [PMID: 33946975 PMCID: PMC8125458 DOI: 10.3390/polym13091435] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/23/2021] [Accepted: 04/24/2021] [Indexed: 12/20/2022] Open
Abstract
Shear coating is a promising deposition method for upscaling device fabrication and enabling high throughput, and is furthermore suitable for translating to roll-to-roll processing. Although common polymer semiconductors (PSCs) are solution processible, they are still prone to mechanical failure upon stretching, limiting applications in e.g., electronic skin and health monitoring. Progress made towards mechanically compliant PSCs, e.g., the incorporation of soft segments into the polymer backbone, could not only allow such applications, but also benefit advanced fabrication methods, like roll-to-roll printing on flexible substrates, to produce the targeted devices. Tri-block copolymers (TBCs), consisting of an inner rigid semiconducting poly-diketo-pyrrolopyrrole-thienothiophene (PDPP-TT) block flanked by two soft elastomeric poly(dimethylsiloxane) (PDMS) chains, maintain good charge transport properties, while being mechanically soft and flexible. Potentially aiming at the fabrication of TBC-based wearable electronics by means of cost-efficient and scalable deposition methods (e.g., blade-coating), a tolerance of the electrical performance of the TBCs to the shear speed was investigated. Herein, we demonstrate that such TBCs can be deposited at high shear speeds (film formation up to a speed of 10 mm s−1). While such high speeds result in increased film thickness, no degradation of the electrical performance was observed, as was frequently reported for polymer−based OFETs. Instead, high shear speeds even led to a small improvement in the electrical performance: mobility increased from 0.06 cm2 V−1 s−1 at 0.5 mm s−1 to 0.16 cm2 V−1 s−1 at 7 mm s−1 for the TBC with 24 wt% PDMS, and for the TBC containing 37 wt% PDMS from 0.05 cm2 V−1 s−1 at 0.5 mm s−1 to 0.13 cm2 V−1 s−1 at 7 mm s−1. Interestingly, the improvement of mobility is not accompanied by any significant changes in morphology.
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Vegiraju S, Amelenan Torimtubun AA, Lin PS, Tsai HC, Lien WC, Chen CS, He GY, Lin CY, Zheng D, Huang YF, Wu YC, Yau SL, Lee GH, Tung SH, Wang CL, Liu CL, Chen MC, Facchetti A. Solution-Processable Quinoidal Dithioalkylterthiophene-Based Small Molecules Pseudo-Pentathienoacenes via an Intramolecular S···S Lock for High-Performance n-Type Organic Field-Effect Transistors. ACS APPLIED MATERIALS & INTERFACES 2020; 12:25081-25091. [PMID: 32340439 DOI: 10.1021/acsami.0c03477] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
A new organic small-molecule family comprising tetracyanoquinodimethane-substituted quinoidal dithioalky(SR)terthiophenes (DSTQs) (DSTQ-6 (1); SR = SC6H13, DSTQ-10 (2); SR = SC10H21, DSTQ-14 (3); SR = SC10H21) was synthesized and contrasted with a nonthioalkylated analogue (DRTQ-14 (4); R = C14H29). The physical, electrochemical, and electrical properties of these new compounds are thoroughly investigated. Optimized geometries obtained from density functional theory calculations and single-crystal X-ray diffraction reveal the planarity of the SR-containing DSTQ core. DSTQs pack in a slipped π-π stacked two-dimensional arrangement, with a short intermolecular stacking distance of 3.55 Å and short intermolecular S···N contacts of 3.56 Å. Thin-film morphological analysis by grazing incident X-ray diffraction reveals that all DSTQ molecules are packed in an edge-on fashion on the substrate. The favorable molecular packing, the high core planarity, and very low lowest unoccupied molecular orbital (LUMO) energy level (-4.2 eV) suggest that DSTQs could be electron-transporting semiconductors. Organic field-effect transistors based on solution-sheared DSTQ-14 exhibit the highest electron mobility of 0.77 cm2 V-1 s-1 with good ambient stability, which is the highest value reported to date for such a solution process terthiophene-based small molecular semiconductor. These results demonstrate that the device performance of solution-sheared DSTQs can be improved by side chain engineering.
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Affiliation(s)
- Sureshraju Vegiraju
- Department of Chemistry and Research Center of New Generation Light Driven Photovoltaic Module, National Central University, Taoyuan 32001, Taiwan
| | - Alfonsina Abat Amelenan Torimtubun
- Department of Chemical and Materials Engineering and Research Center of New Generation Light Driven Photovoltaic Module, National Central University, Taoyuan 32001, Taiwan
| | - Po-Shen Lin
- Department of Chemical and Materials Engineering and Research Center of New Generation Light Driven Photovoltaic Module, National Central University, Taoyuan 32001, Taiwan
| | - Hsin-Chia Tsai
- Department of Chemistry and Research Center of New Generation Light Driven Photovoltaic Module, National Central University, Taoyuan 32001, Taiwan
| | - Wei-Chieh Lien
- Department of Chemistry and Research Center of New Generation Light Driven Photovoltaic Module, National Central University, Taoyuan 32001, Taiwan
| | - Cheng-Shiun Chen
- Department of Chemistry and Research Center of New Generation Light Driven Photovoltaic Module, National Central University, Taoyuan 32001, Taiwan
| | - Guan-Yu He
- Department of Chemical and Materials Engineering and Research Center of New Generation Light Driven Photovoltaic Module, National Central University, Taoyuan 32001, Taiwan
| | - Chih-Yu Lin
- Department of Chemical and Materials Engineering and Research Center of New Generation Light Driven Photovoltaic Module, National Central University, Taoyuan 32001, Taiwan
| | - Ding Zheng
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Yi-Fan Huang
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Yi-Ching Wu
- Department of Chemistry and Research Center of New Generation Light Driven Photovoltaic Module, National Central University, Taoyuan 32001, Taiwan
| | - Shueh-Lin Yau
- Department of Chemistry and Research Center of New Generation Light Driven Photovoltaic Module, National Central University, Taoyuan 32001, Taiwan
| | - Gene-Hsiang Lee
- Instrumentation Center, National Taiwan University, Taipei 10617, Taiwan
| | - Shih-Huang Tung
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Chien-Lung Wang
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Cheng-Liang Liu
- Department of Chemical and Materials Engineering and Research Center of New Generation Light Driven Photovoltaic Module, National Central University, Taoyuan 32001, Taiwan
| | - Ming-Chou Chen
- Department of Chemistry and Research Center of New Generation Light Driven Photovoltaic Module, National Central University, Taoyuan 32001, Taiwan
| | - Antonio Facchetti
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
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Large-scale patterning of π-conjugated materials by meniscus guided coating methods. Adv Colloid Interface Sci 2020; 275:102080. [PMID: 31809990 DOI: 10.1016/j.cis.2019.102080] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 09/30/2019] [Accepted: 11/20/2019] [Indexed: 11/21/2022]
Abstract
Printed organic electronics has attracted considerable interest in recent years as it enables the fabrication of large-scale, low-cost electronic devices, and thus offers significant possibilities in terms of developing new applications in various fields. Easy processing is a prerequisite for the development of low-cost, flexible and printed plastics electronics. Among processing techniques, meniscus guided coating methods are considered simple, efficient, and low-cost methods to fabricate electronic devices in industry. One of the major challenges is the control of thin film morphology, molecular orientations and directional alignment of polymer films during coating processes. Herein, the recent progress of emerging field of meniscus guided printing organic semiconductor materials is discussed. The first part of this report briefly summarizes recent advances in meniscus guided coating techniques. The second part discusses periodic deposits and patterned deposition at moving contact lines, where the mass-transport influences film morphology due to convection at the triple contact line. The last section summarizes our strategy to fabricate large-scale patterning of π-conjugated polymers using meniscus guided method.
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Teixeira da Rocha C, Qu G, Yang X, Shivhare R, Hambsch M, Diao Y, Mannsfeld SCB. Mitigating Meniscus Instabilities in Solution-Sheared Polymer Films for Organic Field-Effect Transistors. ACS APPLIED MATERIALS & INTERFACES 2019; 11:30079-30088. [PMID: 31403762 DOI: 10.1021/acsami.9b07832] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Semiconducting donor-acceptor copolymers are considered to be a promising material class for solution-coated, large-scale organic electronic applications. A large number of works have shown that the best-performing organic field-effect transistors (OFETs) are obtained on low-surface-energy substrates. The meniscus instabilities that occur when coating on such surfaces considerably limit the effective deposition speeds. This represents a limiting factor for the upscaling of device fabrication for mass production, an issue that needs to be addressed if organic electronic devices are ever to become commercially relevant. In this work, we present a method to increase the accessible window of coating speeds for the solution shearing of donor-acceptor semiconductor polymers for the fabrication of OFETs. By incorporating a piezo crystal that is capable of producing high-frequency vibrations into the coating head, we are able to mitigate contact line instabilities due to the depinning of the contact line, thereby suppressing the commonly encountered "stick-and-slip" phenomenon.
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Affiliation(s)
| | - Ge Qu
- Department of Chemical and Biomolecular Engineering , University of Illinois Urbana-Champaign , 600 S. Mathews Avenue , Urbana , Illinois 61801 , United States
| | - Xuegeng Yang
- Institute of Fluid Dynamics , Helmholtz-Zentrum Dresden-Rossendorf (HZDR) , Bautzner Landstraße 400 , Dresden 01328 , Germany
| | | | | | - Ying Diao
- Department of Chemical and Biomolecular Engineering , University of Illinois Urbana-Champaign , 600 S. Mathews Avenue , Urbana , Illinois 61801 , United States
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